"Let Me Know" is a song by Irish recording artist Róisín Murphy from her second solo studio album, Overpowered. Written and produced by Murphy and Andy Cato of Groove Armada, the song was released as the album's second single on 8 October 2007. "Let Me Know" reached number twenty-eight in the United Kingdom, becoming Murphy's highest-peaking solo hit to date. The track is based on Tracy Weber's 1981 song "Sure Shot" and D. Train's 1982 song "Keep On".

The art director of the single was British graphic designer Scott King and the photographer was Jonathan de Villiers. Murphy is depicted wearing a design by English fashion designer Gareth Pugh on the cover.

"Let Me Know" received positive reviews from music critics. While reviewing Overpowered, Mark Edwards of The Sunday Times commented that the song's hook is "strong enough to compensate for the album's duller moments." Nick Levine of Digital Spy gave the song four out of five stars, stating that it "melds propulsive synths, a nineties house piano riff and Murphy's crystalline vocals to create a groove that's harder to resist that a night of passion with Brad or Angelina (or both of them—whatever floats your boat, eh?)." Gemma Hampson wrote for musicOMH that it "retains a bit of that Moloko odd-ness that set the band aside from all the other disco, funk, dance groups around at the same time. Murphy's soft and feminine voice sits well above the '80s bouncy bass and funky electro percussion. It's got a good, retro beat, ruined slightly by the dated fake piano heard all too much in dance in the past 25 years."

Róisín Marie Murphy (Irish pronunciation: [roːˈʃʲiːnʲ], English: /roʊˈʃiːn/; born 5 July 1973) is an Irish singer-songwriter and record producer, known for her electronic style. Murphy has a contralto vocal range.

Murphy first came to note as one half of the electronic music duo Moloko with her then-boyfriend Mark Brydon. After the two ended their romantic relationship, Murphy released her debut solo album Ruby Blue, written and produced with Matthew Herbert, in 2005. Her second solo album Overpowered was released in 2007.

Murphy was brought up in Arklow, County Wicklow, Ireland, in a Roman Catholic family. When she was twelve, her family moved to Manchester, England. Murphy embraced 1960s fashions from going with her mother, an antique dealer, to car boot sales and charity shops. She concealed her singing voice, not wanting other people to know she "sounded like Elaine Paige" when she herself enjoyed listening to the likes of Sonic Youth and Pixies instead.

After three years of living in Manchester, her parents divorced and moved back to Ireland. Murphy insisted on remaining alone in the UK because she did not think that her mother had the strength to continue taking care of her. Murphy lived with her best friend for a year, until she could receive Housing Benefit and live in a nearby flat. She was bullied at school and befriended a group of "weird boys who wore black" and who listened to the Jesus and Mary Chain. She enrolled in a sixth form college at seventeen and later considered going to art school. She moved to Sheffield where she began going to nightclubs and was inspired by the Vivienne Westwood designs she saw at Trash.

Collie Buddz (born Colin Harper, August 21, 1981) is a Bermudian reggae and dancehall artist best known for his single "Come Around". Although born in New Orleans, Louisiana, he was raised in Bermuda. He studied audio engineering at Full Sail University in Orlando, FL. He performed on Shaggy's 2007 album Intoxication on the track "Mad Mad World". In 2008, he performed the song "SOS" on WWE The Music, Vol. 8 as the entrance theme for wrestler Kofi Kingston. He also appeared in a 2009 remix of Kid Cudi's single "Day 'n' Nite". His name is based on slang for cannabis. He launched his own record label 'Harper Digital.' Collie Buddz first critically acclaimed album had strong sales internationally and included strong sales in Canada as well which he credits as his home away from home, which is one of his main inspirations for his album as he wrote all of his songs with the exception of three in Toronto, Ontario, Canada.

Paul Walden (born 6 June 1964), commonly known as Guru Josh, is an English musician currently performing under his own stage name as Guru Josh. Guru Josh was an original music icon of the British post-acid house music scene in 1990, most recognised for his debut single "Infinity," initially released in 1989 on Walden's record label, Infinity Records. The song was later re-released in 1990 by BMG Records, and remixed for re-release in 2008 by the German artist DJ Klaas.

Guru Josh is a Songwriter/Musician/Producer who creates his own music yet also performs live on Stage using a Roland G6 Keyboard accompanied by a saxophonist whilst playing a medley of his hits, he also is active in creating new tracks on a regular basis and on occasion also DJs when required.

Walden is the son of a Jersey dentist, Harold Walden. After studying dentistry in 1981, he began his career as an entertainer and keyboard player at the Sands nightclub in Jersey, performing under the name of Syndrone and Animal and his Crazy Organs. Soon after, he joined forces with the likes of Seal and Adamski.

Dwayne Michael Carter, Jr. (born September 27, 1982), better known by his stage name Lil Wayne, is an American rapper. At the age of nine, Lil Wayne joined Cash Money Records as the youngest member of the label, and half of the duo, The B.G.'z, with B.G.. In 1997, Lil Wayne joined the group Hot Boys, which also included rappers Juvenile, B.G., and Young Turk. Hot Boys debuted with Get It How U Live! that year. Lil Wayne gained most of his success with the group's major selling album Guerrilla Warfare, released in 1999. Also in 1999, Lil Wayne released his Platinum debut album Tha Block Is Hot, selling over one million copies in the U.S.

Although his next two albums Lights Out (2000) and 500 Degreez (2002) were not as successful (only reaching Gold status), Lil Wayne reached higher popularity in 2004 with Tha Carter, which included the single "Go D.J." Wayne also appeared on the Destiny's Child top ten single "Soldier" that year. In 2005, the sequel to Tha Carter, Tha Carter II, was released. In 2006 and 2007, Lil Wayne released several mixtapes and appeared on several popular rap and R&B singles. His most successful album, Tha Carter III, was released in 2008 and sold over 1 million copies in the U.S. its first week of release. It included the number-one single "Lollipop" featuring Static Major. It also includes the singles "A Milli" and "Got Money" featuring T-Pain and won the Grammy Award for Best Rap Album.